Receiving the error Unparsable SDP (code 28)

+2 votes

On incoming calls I am receiving the error Unparsable SDP (code 28)

Phone version: Zoiper5 5.3.8 for Windows 64bit
Library revision: v2.9.30
Phone revision: 5.3.8_Windows
UI revision: 1.2.17

To test I loaded Microsip Portable on the same windows machine (same number and credentials) and the incoming calls work fine. 


STUN Server: Off and On
Enabled all available codecs
Enabled TCP
Use rport: Off and ON
Use rport media: Off and ON

I also have the Zoiper debug from the last failed incoming call. 
asked Mar 31, 2020 in Windows by jamric4173 (140 points)  

Do you have a support ticket number ?

If not, I suggest to open one by using the contact for on our website. This is some negotiation issue, but only the debug-log can show what it is.

Do not post it here, since it contains some private information.

No, I do not have a ticket because when I select "free" under contact it takes me to the FAQ. 




Send an email directly to s u p p o r t [a t] zoiper [ dot ] com

Mention this post there, zip the debug-log, attach it and describe the issue again.

Please log in or register to answer this question.

Ask your questions and receive answers from other members of the Zoiper Community.

Did you check our Help Section?

You are a Zoiper Biz or Premium customer? If so, click HERE to get premium support.
Top users 12/2023
  1. Tsetso.Zdravkov

    34310 Points

  2. Ivan

    18410 Points

  3. Joachim

    11490 Points

  4. Anton

    3950 Points

Latest tweets